The Dremora Lord may say "You returned? Foolish mortal!" to Dragons and other Daedra, even though they're not mortals.

If the Sanguine Rose is given to a follower who uses it, the summoned Dremora will sometimes interact with the surroundings when not in battle, for example sit on a bench or warm their hands over a fire.

On very rare occasions, this spell can conjure two Dremora Lords at once (even without the twin souls perk) or conjure an unbound Dremora that will still have the player's name on it. Just like a regular atronach, it will be friendly; this Dremora can also be killed for his heart and his body will not disappear, even after summoning a new Dremora.